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Error Indication
When performing a tuning cycle, there are several conditions that may occur that cause the tune to
fail. All are reported as an error, which is indicated by the entire row of PWR LEDs flashing briefly.
•
No RF power was present at the beginning of a tuning cycle. In other words, the
Tune
button was
pressed to request a tune cycle, but the transmitter was not keyed up.
•
RF power disappeared before the tuning cycle completed. You must continue to key the radio until
the tuning cycle completes.
•
Meter over-range. The input power was over the currently selected meter range, or the SWR
exceeded 3.5:1
ADVANCED OPERATION
Manual Inductor/Capacitor Adjustments
In some rare cases, after tuning, it may be desirable to adjust the the inductance and capacitance
settings that the AT-100Pro came up with during the tuning process. This is more likely to occur when
attempting to tune an antenna far from its resonant frequency.
The
C Up, C Dn, L Up,
and
L Dn
buttons may be used to increment or decrement the amount of
capacitance or inductance, respectively. A momentary press of any of these buttons increments or
decrements the value by one unit, and displays the resulting value on the bargraph meter. Capacitance
value is displayed on the PWR bargraph, and inductance on the SWR bargraph. These values are
displayed in binary, left justified. The lowest-order relay is displayed on the leftmost LED. The rightmost
LED on the PWR bargraph displays the state of the High/Low Impedance relay.
Repeatedly press one of these buttons to increment or decrement multiple times, or simply hold the
button and the button will auto-repeat. You may also transmit while incrementing or decrementing, so that
the SWR value is displayed, but the capacitor and inductor values will not be displayed during transmit;
instead, the power and SWR levels are displayed.
Summary of Contents for AT-100Pro
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